"世界是一个影子，而影子是一场游戏。"

The meaning of earthly existence lies not, as we have grown used to thinking, in prospering but in the development of the soul.

获得自由的唯一途径就是保持诚实。

I have always lived in my imagination; reality bores me.

数学的研究是所有智力和精神进步不可或缺的基础。

哲学在成功时是装饰品，在失意时是避难所，在年老时是供应品。